On Aquatic Carnivorous Coleoptera or Dytiscide. 539 
The male has the front and middle tarsi a little incrassate, and furnished beneath 
with rather long hairs which bear very minute palettes ; there is no trace of oblique 
striz on the apical ventral segment. There is no difference in the sculpture of the 
sexes. 
Australia. 816. 
760. Agabus reticulosus, Clk., M.C.—Ovalis, minus brevis, sat convexus, sub- 
opacus, fusco-niger, antennis pedibusque rufis, capite anterius prothoraceque lateribus 
yage rufescentibus, elytris pone medium vitta sublaterali, indeterminata, plus 
minusve elongata, testacea; supra densius reticulatus; prothorace cum elytris 
continuo, anculis posterioribus haud acutis; prosterni processu angusto. Long. 
7 Next, 44 iinTM, 
The male has the front aud middle tarsi distinctly merassate and furnished 
beneath with rather long hairs which bear small palettes; there seems to be a 
slight sexual difference in the sculpture of the upper surface, the female having 
the reticulations on the basal portion of the elytra rather denser, and the meshes 
narrower. 
The few specimens I have seen are immature and soft ; in them the under surface 
has the ventral segments somewhat more rufescent than the breast ; the colour on 
the upper surface is very ill-defined, there is a vague rufescent area near the 
shoulders of the elytra, with which the sublateral mark tends to be connected. 
The serial punctures of the elytra are excessively obsolete. 
Australia. 817. 
761. Platynectes limbatus, n. sp.— (6). Ovalis, sat convexus, fere angustus, sub- 
nitidus, fusco-niger, antennis pedibusque rufis, capite anterius et prothorace lateribus 
anguste, elytris lateribus late, rufescentibus ; supra densius subtiliusque reticulatus ; 
prothorace cum elytris continuo, angulis posterioribus haud acutis ; prosterni pro- 
cessu angusto. Long. 7, lat. vix 4 m.m. 
The only individual I have seen is a female, and though very similar to Agabus 
reticulosus, indicates an undoubtedly distinct species, the size is smaller, the form 
narrower, the upper surface less dull, the outer portion of the elytra more broadly 
reddish, the serial punctures of the elytra less obsolete, and the coxal lines rather 
more widely separated. 
Australia. 818. 
762. Platynectes obscurus, n. sp.—Ovalis, fere angustus, sub-convexus, nitidus, 
niger supra eenescens, elytris vittula sublaterali pone medium testacea, antennis 
pedibusque rufis ; supra crebrius subtiliter reticulatus ; thorace cum elytris omnino 
TRANS. ROY. DUB. SOC., N.S., VOL. I. 4A 
